<PAGE> PAGE 1
000 B000000 01/31/95
000 C000000 225604
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000 E000000 NF
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000 G000000 N
000 H000000 N
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001 C000000 6179545000
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002 D010000 02116
003 000000 N
004 000000 N
005 000000 N
006 000000 N
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007 B000000 2
007 C010100 1
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007 C020200 MFS MUNICIPAL HIGH INCOME FUND
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007 C010300 3
007 C010400 4
007 C010500 5
007 C010600 6
007 C010700 7
007 C010800 8
007 C010900 9
007 C011000 10
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008 B00AA01 A
008 C00AA01 801-17352
008 D01AA01 BOSTON
008 D02AA01 MA
008 D03AA01 02116
011 A00AA01 MFS FINANCIAL SERVICES, INC.
011 B00AA01 8-27864
011 C01AA01 BOSTON
011 C02AA01 MA
011 C03AA01 02116
012 A00AA01 MFS SERVICE CENTER, INC.
012 B00AA01 84-1316
012 C01AA01 BOSTON
012 C02AA01 MA
<PAGE> PAGE 2
012 C03AA01 02116
018 00AA00 Y
019 A00AA00 Y
019 B00AA00 50
019 C00AA00 MASSFINSER
020 A000001 PETRIE PARKMAN & CO.
020 B000001 00-0000000
020 C000001 5
020 A000002 DUNLEVY & COMPANY
020 B000002 13-2919975
020 C000002 4
020 A000003 SMITH BARNEY SHEARSON
020 B000003 13-1912900
020 C000003 4
020 A000004 GRANTCHESTER SECURITIES
020 B000004 13-3502273
020 C000004 1
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020 B000005 13-3443395
020 C000005 1
020 C000006 0
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020 C000010 0
021 000000 14
022 A000001 LEHMAN BROTHERS
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022 C000001 559292
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022 B000002 38-1612444
022 C000002 444949
022 D000002 0
022 A000003 GOLDMAN SACHS & COMPANY
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022 C000003 296782
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022 C000004 162767
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022 D000005 49016
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022 D000006 56878
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<PAGE> PAGE 3
022 B000007 13-3224016
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022 D000008 29269
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<PAGE> PAGE 4
077 E000000 N
077 F000000 N
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013 B010101 BOSTON
013 B020101 MA
013 B030101 02110
015 A000101 STATE STREET BANK AND TRUST COMPANY
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015 C020101 MA
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<PAGE> PAGE 5
015 A000102 CHASE MANHATTAN BANK, N.A.
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<PAGE> PAGE 6
040 000100 Y
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055 B000100 N
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<PAGE> PAGE 7
060 A000100 Y
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070 F020100 N
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070 H010100 N
070 H020100 N
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<PAGE> PAGE 8
070 N020100 N
070 O010100 Y
070 O020100 N
070 P010100 Y
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070 Q020100 N
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070 R020100 N
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<PAGE> PAGE 9
074 B000100 0
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013 A000201 ERNST & YOUNG LLP
013 B010201 BOSTON
013 B020201 MA
013 B030201 02109
015 A000201 STATE STREET BANK AND TRUST COMPANY
015 B000201 C
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015 C020201 MA
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015 A000202 BANK OF NEW YORK
015 B000202 S
015 C010202 NEW YORK
015 C020202 NY
015 C030202 10286
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015 A000203 CHEMICAL BANK
015 B000203 S
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<PAGE> PAGE 10
015 C020203 NY
015 C030203 10041
015 E010203 X
015 A000204 MORGAN GUARANTY TRUST COMPANY
015 B000204 S
015 C010204 NEW YORK
015 C020204 NY
015 C030204 10015
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015 A000205 BANKERS TRUST COMPANY
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<PAGE> PAGE 11
032 000200 1603
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<PAGE> PAGE 12
053 A000200 N
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<PAGE> PAGE 13
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<PAGE> PAGE 14
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SIGNATURE JAMES O. YOST
TITLE ASSISTANT TREASURER
WARNING: THE EDGAR SYSTEM ENCOUNTERED ERROR(S) WHILE PROCESSING THIS SCHEDULE.
<TABLE> <S> <C>
<ARTICLE> 6
<LEGEND>
THIS SCHEDULE CONTAINS SUMMARY FINANCIAL INFORMATION EXTRACTED FROM
THE FINANCIAL STATEMENTS OF MFS HIGH INCOME FUND AND IS
QUALIFIED IN ITS ENTIRETY BY REFERENCE TO SUCH FINANCIAL STATEMENTS.
</LEGEND>
<SERIES>
<NUMBER>
<NAME> MFS HIGH INCOME FUND CLASS A
<S> <C>
<PERIOD-TYPE> 12-MOS
<FISCAL-YEAR-END> JAN-31-1995
<PERIOD-END> JAN-31-1995
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<INVESTMENTS-AT-VALUE> 804,264,908
<RECEIVABLES> 24,180,254
<ASSETS-OTHER> 14,034
<OTHER-ITEMS-ASSETS> 39,155
<TOTAL-ASSETS> 828,498,351
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<ACCUMULATED-NII-CURRENT> (62,774)
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<ACCUMULATED-NET-GAINS> (249,658,152)
<OVERDISTRIBUTION-GAINS> 0
<ACCUM-APPREC-OR-DEPREC> (88,402,072)
<NET-ASSETS> 812,852,472
<DIVIDEND-INCOME> 170,746
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<OTHER-INCOME> 0
<EXPENSES-NET> 10,768,448
<NET-INVESTMENT-INCOME> 69,190,438
<REALIZED-GAINS-CURRENT> (24,359,807)
<APPREC-INCREASE-CURRENT> (82,756,770)
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<DISTRIBUTIONS-OF-INCOME> (46,197,364)
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<NUMBER-OF-SHARES-REDEEMED> (55,887,292)
<SHARES-REINVESTED> 5,157,706
<NET-CHANGE-IN-ASSETS> (203,419,266)
<ACCUMULATED-NII-PRIOR> (1,027,715)
<ACCUMULATED-GAINS-PRIOR> (210,514,331)
<OVERDISTRIB-NII-PRIOR> 0
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<INTEREST-EXPENSE> 0
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<AVERAGE-NET-ASSETS> 862,762,970
<PER-SHARE-NAV-BEGIN> 5.50
<PER-SHARE-NII> 0.44
<PER-SHARE-GAIN-APPREC> (0.66)
<PER-SHARE-DIVIDEND> (0.43)
<PER-SHARE-DISTRIBUTIONS> (0.01)
<RETURNS-OF-CAPITAL> 0.00
<PER-SHARE-NAV-END> 4.84
<EXPENSE-RATIO> 0.99
<AVG-DEBT-OUTSTANDING> 0
<AVG-DEBT-PER-SHARE> 0
</TABLE>
WARNING: THE EDGAR SYSTEM ENCOUNTERED ERROR(S) WHILE PROCESSING THIS SCHEDULE.
<TABLE> <S> <C>
<ARTICLE> 6
<LEGEND>
THIS SCHEDULE CONTAINS SUMMARY FINANCIAL INFORMATION EXTRACTED FROM
THE FINANCIAL STATEMENTS OF MFS HIGH INCOME FUND AND IS
QUALIFIED IN ITS ENTIRETY BY REFERENCE TO SUCH FINANCIAL STATEMENTS.
</LEGEND>
<SERIES>
<NUMBER>
<NAME> MFS HIGH INCOME FUND CLASS B
<S> <C>
<PERIOD-TYPE> 12-MOS
<FISCAL-YEAR-END> JAN-31-1995
<PERIOD-END> JAN-31-1995
<INVESTMENTS-AT-COST> 892,675,204
<INVESTMENTS-AT-VALUE> 804,264,908
<RECEIVABLES> 24,180,254
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<OTHER-ITEMS-ASSETS> 39,155
<TOTAL-ASSETS> 828,498,351
<PAYABLE-FOR-SECURITIES> 11,574,597
<SENIOR-LONG-TERM-DEBT> 0
<OTHER-ITEMS-LIABILITIES> 4,071,282
<TOTAL-LIABILITIES> 15,645,879
<SENIOR-EQUITY> 0
<PAID-IN-CAPITAL-COMMON> 1,150,975,470
<SHARES-COMMON-STOCK> 58,992,349
<SHARES-COMMON-PRIOR> 67,405,086
<ACCUMULATED-NII-CURRENT> (62,774)
<OVERDISTRIBUTION-NII> 0
<ACCUMULATED-NET-GAINS> (249,658,152)
<OVERDISTRIBUTION-GAINS> 0
<ACCUM-APPREC-OR-DEPREC> (88,402,072)
<NET-ASSETS> 812,852,472
<DIVIDEND-INCOME> 170,746
<INTEREST-INCOME> 79,788,140
<OTHER-INCOME> 0
<EXPENSES-NET> 10,768,448
<NET-INVESTMENT-INCOME> 69,190,438
<REALIZED-GAINS-CURRENT> (24,359,807)
<APPREC-INCREASE-CURRENT> (82,756,770)
<NET-CHANGE-FROM-OPS> (37,926,139)
<EQUALIZATION> 0
<DISTRIBUTIONS-OF-INCOME> (23,170,851)
<DISTRIBUTIONS-OF-GAINS> 0
<DISTRIBUTIONS-OTHER> 0
<NUMBER-OF-SHARES-SOLD> 35,621,772
<NUMBER-OF-SHARES-REDEEMED> (46,104,410)
<SHARES-REINVESTED> 2,069,901
<NET-CHANGE-IN-ASSETS> (203,419,266)
<ACCUMULATED-NII-PRIOR> (1,027,715)
<ACCUMULATED-GAINS-PRIOR> (210,514,331)
<OVERDISTRIB-NII-PRIOR> 0
<OVERDIST-NET-GAINS-PRIOR> 0
<GROSS-ADVISORY-FEES> 3,756,072
<INTEREST-EXPENSE> 0
<GROSS-EXPENSE> 11,300,062
<AVERAGE-NET-ASSETS> 862,762,970
<PER-SHARE-NAV-BEGIN> 5.50
<PER-SHARE-NII> 0.39
<PER-SHARE-GAIN-APPREC> (0.65)
<PER-SHARE-DIVIDEND> (0.39)
<PER-SHARE-DISTRIBUTIONS> (0.01)
<RETURNS-OF-CAPITAL> 0.00
<PER-SHARE-NAV-END> 4.84
<EXPENSE-RATIO> 1.85
<AVG-DEBT-OUTSTANDING> 0
<AVG-DEBT-PER-SHARE> 0
</TABLE>
WARNING: THE EDGAR SYSTEM ENCOUNTERED ERROR(S) WHILE PROCESSING THIS SCHEDULE.
<TABLE> <S> <C>
<ARTICLE> 6
<LEGEND>
THIS SCHEDULE CONTAINS SUMMARY FINANCIAL INFORMATION EXTRACTED FROM
THE FINANCIAL STATEMENTS OF MFS HIGH INCOME FUND AND IS
QUALIFIED IN ITS ENTIRETY BY REFERENCE TO SUCH FINANCIAL STATEMENTS.
</LEGEND>
<SERIES>
<NUMBER>
<NAME> MFS HIGH INCOME FUND CLASS C
<S> <C>
<PERIOD-TYPE> 12-MOS
<FISCAL-YEAR-END> JAN-31-1995
<PERIOD-END> JAN-31-1995
<INVESTMENTS-AT-COST> 892,675,204
<INVESTMENTS-AT-VALUE> 804,264,908
<RECEIVABLES> 24,180,254
<ASSETS-OTHER> 14,034
<OTHER-ITEMS-ASSETS> 39,155
<TOTAL-ASSETS> 828,498,351
<PAYABLE-FOR-SECURITIES> 11,574,597
<SENIOR-LONG-TERM-DEBT> 0
<OTHER-ITEMS-LIABILITIES> 4,071,282
<TOTAL-LIABILITIES> 15,645,879
<SENIOR-EQUITY> 0
<PAID-IN-CAPITAL-COMMON> 1,150,975,470
<SHARES-COMMON-STOCK> 706,226
<SHARES-COMMON-PRIOR> 187,887
<ACCUMULATED-NII-CURRENT> (62,774)
<OVERDISTRIBUTION-NII> 0
<ACCUMULATED-NET-GAINS> (249,658,152)
<OVERDISTRIBUTION-GAINS> 0
<ACCUM-APPREC-OR-DEPREC> (88,402,072)
<NET-ASSETS> 812,852,472
<DIVIDEND-INCOME> 170,746
<INTEREST-INCOME> 79,788,140
<OTHER-INCOME> 0
<EXPENSES-NET> 10,768,448
<NET-INVESTMENT-INCOME> 69,190,438
<REALIZED-GAINS-CURRENT> (24,359,807)
<APPREC-INCREASE-CURRENT> (82,756,770)
<NET-CHANGE-FROM-OPS> (37,926,139)
<EQUALIZATION> 0
<DISTRIBUTIONS-OF-INCOME> (193,662)
<DISTRIBUTIONS-OF-GAINS> 0
<DISTRIBUTIONS-OTHER> 0
<NUMBER-OF-SHARES-SOLD> 1,348,486
<NUMBER-OF-SHARES-REDEEMED> (856,606)
<SHARES-REINVESTED> 26,459
<NET-CHANGE-IN-ASSETS> (203,419,266)
<ACCUMULATED-NII-PRIOR> (1,027,715)
<ACCUMULATED-GAINS-PRIOR> (210,514,331)
<OVERDISTRIB-NII-PRIOR> 0
<OVERDIST-NET-GAINS-PRIOR> 0
<GROSS-ADVISORY-FEES> 3,756,072
<INTEREST-EXPENSE> 0
<GROSS-EXPENSE> 11,300,062
<AVERAGE-NET-ASSETS> 862,762,970
<PER-SHARE-NAV-BEGIN> 5.50
<PER-SHARE-NII> 0.41
<PER-SHARE-GAIN-APPREC> (0.66)
<PER-SHARE-DIVIDEND> (0.39)
<PER-SHARE-DISTRIBUTIONS> (0.01)
<RETURNS-OF-CAPITAL> 0.00
<PER-SHARE-NAV-END> 4.85
<EXPENSE-RATIO> 1.79
<AVG-DEBT-OUTSTANDING> 0
<AVG-DEBT-PER-SHARE> 0
</TABLE>
WARNING: THE EDGAR SYSTEM ENCOUNTERED ERROR(S) WHILE PROCESSING THIS SCHEDULE.
<TABLE> <S> <C>
<ARTICLE> 6
<LEGEND>
THIS SCHEDULE CONTAINS SUMMARY FINANCIAL INFORMATION EXTRACTED FROM
THE FINANCIAL STATEMENTS OF MASSACHUSETTS FINANCIAL SERVICES AND IS
QUALIFIED IN ITS ENTIRETY BY REFERENCE TO SUCH FINANCIAL STATEMENTS.
</LEGEND>
<SERIES>
<NUMBER> 2
<NAME> MFS MUNICIPAL HIGH INCOME FUND-CLASS A
<S> <C>
<PERIOD-TYPE> 12-MOS
<FISCAL-YEAR-END> JAN-31-1995
<PERIOD-END> JAN-31-1995
<INVESTMENTS-AT-COST> 1,005,158,171
<INVESTMENTS-AT-VALUE> 984,592,244
<RECEIVABLES> 24,356,103
<ASSETS-OTHER> 10,608
<OTHER-ITEMS-ASSETS> 38,525
<TOTAL-ASSETS> 1,008,997,480
<PAYABLE-FOR-SECURITIES> 31,240,000
<SENIOR-LONG-TERM-DEBT> 0
<OTHER-ITEMS-LIABILITIES> 2,039,633
<TOTAL-LIABILITIES> 33,279,633
<SENIOR-EQUITY> 0
<PAID-IN-CAPITAL-COMMON> 1,074,349,203
<SHARES-COMMON-STOCK> 107,020,050
<SHARES-COMMON-PRIOR> 86,342,748
<ACCUMULATED-NII-CURRENT> 1,098,869
<OVERDISTRIBUTION-NII> 0
<ACCUMULATED-NET-GAINS> (79,164,298)
<OVERDISTRIBUTION-GAINS> 0
<ACCUM-APPREC-OR-DEPREC> (20,565,927)
<NET-ASSETS> 975,717,847
<DIVIDEND-INCOME> 0
<INTEREST-INCOME> 76,354,946
<OTHER-INCOME> 0
<EXPENSES-NET> 9,913,116
<NET-INVESTMENT-INCOME> 66,441,830
<REALIZED-GAINS-CURRENT> (34,044,867)
<APPREC-INCREASE-CURRENT> (41,635,823)
<NET-CHANGE-FROM-OPS> (9,238,860)
<EQUALIZATION> 0
<DISTRIBUTIONS-OF-INCOME> (66,774,251)
<DISTRIBUTIONS-OF-GAINS> 0
<DISTRIBUTIONS-OTHER> 0
<NUMBER-OF-SHARES-SOLD> 32,283,057
<NUMBER-OF-SHARES-REDEEMED> (14,365,883)
<SHARES-REINVESTED> 2,760,128
<NET-CHANGE-IN-ASSETS> 169,759,297
<ACCUMULATED-NII-PRIOR> 1,095,222
<ACCUMULATED-GAINS-PRIOR> (42,807,444)
<OVERDISTRIB-NII-PRIOR> 0
<OVERDIST-NET-GAINS-PRIOR> 0
<GROSS-ADVISORY-FEES> 6,385,098
<INTEREST-EXPENSE> 0
<GROSS-EXPENSE> 9,913,116
<AVERAGE-NET-ASSETS> 885,034,511
<PER-SHARE-NAV-BEGIN> 9.38
<PER-SHARE-NII> 0.64
<PER-SHARE-GAIN-APPREC> (0.75)
<PER-SHARE-DIVIDEND> 0
<PER-SHARE-DISTRIBUTIONS> (0.67)
<RETURNS-OF-CAPITAL> 0
<PER-SHARE-NAV-END> 8.60
<EXPENSE-RATIO> 1.04%
<AVG-DEBT-OUTSTANDING> 0
<AVG-DEBT-PER-SHARE> 0
</TABLE>
WARNING: THE EDGAR SYSTEM ENCOUNTERED ERROR(S) WHILE PROCESSING THIS SCHEDULE.
<TABLE> <S> <C>
<ARTICLE> 6
<LEGEND>
THIS SCHEDULE CONTAINS SUMMARY FINANCIAL INFORMATION EXTRACTED FROM
THE FINANCIAL STATEMENTS OF MASSACHUSETTS FINANCIAL SERVICES AND IS
QUALIFIED IN ITS ENTIRETY BY REFERENCE TO SUCH FINANCIAL STATEMENTS.
</LEGEND>
<SERIES>
<NUMBER>
<NAME> MFS MUNICIPAL HIGH INCOME FUND-CLASS B
<S> <C>
<PERIOD-TYPE> 12-MOS
<FISCAL-YEAR-END> JAN-31-1995
<PERIOD-END> JAN-31-1995
<INVESTMENTS-AT-COST> 1,005,158,171
<INVESTMENTS-AT-VALUE> 984,592,244
<RECEIVABLES> 24,356,103
<ASSETS-OTHER> 10,608
<OTHER-ITEMS-ASSETS> 38,525
<TOTAL-ASSETS> 1,008,997,480
<PAYABLE-FOR-SECURITIES> 31,240,000
<SENIOR-LONG-TERM-DEBT> 0
<OTHER-ITEMS-LIABILITIES> 2,039,633
<TOTAL-LIABILITIES> 33,279,633
<SENIOR-EQUITY> 0
<PAID-IN-CAPITAL-COMMON> 1,074,349,203
<SHARES-COMMON-STOCK> 6,476,558
<SHARES-COMMON-PRIOR> 125
<ACCUMULATED-NII-CURRENT> 1,098,869
<OVERDISTRIBUTION-NII> 0
<ACCUMULATED-NET-GAINS> (79,164,298)
<OVERDISTRIBUTION-GAINS> 0
<ACCUM-APPREC-OR-DEPREC> (20,565,927)
<NET-ASSETS> 975,717,847
<DIVIDEND-INCOME> 0
<INTEREST-INCOME> 76,354,946
<OTHER-INCOME> 0
<EXPENSES-NET> 9,913,116
<NET-INVESTMENT-INCOME> 66,441,830
<REALIZED-GAINS-CURRENT> (34,044,867)
<APPREC-INCREASE-CURRENT> (41,635,823)
<NET-CHANGE-FROM-OPS> (9,238,860)
<EQUALIZATION> 0
<DISTRIBUTIONS-OF-INCOME> (1,978,622)
<DISTRIBUTIONS-OF-GAINS> 0
<DISTRIBUTIONS-OTHER> 0
<NUMBER-OF-SHARES-SOLD> 6,732,579
<NUMBER-OF-SHARES-REDEEMED> (356,549)
<SHARES-REINVESTED> 100,403
<NET-CHANGE-IN-ASSETS> 169,759,297
<ACCUMULATED-NII-PRIOR> 1,095,222
<ACCUMULATED-GAINS-PRIOR> (42,807,477)
<OVERDISTRIB-NII-PRIOR> 0
<OVERDIST-NET-GAINS-PRIOR> 0
<GROSS-ADVISORY-FEES> 6,385,098
<INTEREST-EXPENSE> 0
<GROSS-EXPENSE> 9,913,116
<AVERAGE-NET-ASSETS> 33,436,705
<PER-SHARE-NAV-BEGIN> 9.38
<PER-SHARE-NII> 0.57
<PER-SHARE-GAIN-APPREC> (0.78)
<PER-SHARE-DIVIDEND> 0
<PER-SHARE-DISTRIBUTIONS> (0.57)
<RETURNS-OF-CAPITAL> 0
<PER-SHARE-NAV-END> 8.60
<EXPENSE-RATIO> 2.10%
<AVG-DEBT-OUTSTANDING> 0
<AVG-DEBT-PER-SHARE> 0
</TABLE>
