X0101 24F-2NT LIVE 1330967 XXXXXXXX false N-1A MFS Series Trust XII 111 Huntington Avenue Boston MA X1 02199 MFS LIFETIME INCOME FUND S000002501 A C000006793 B C000006794 C C000006795 I C000006796 R1 C000006797 R2 C000006799 R3 C000006800 R4 C000006801 R6 C000173225 MFS LIFETIME 2020 FUND S000002503 A C000006811 B C000006812 C C000006813 I C000006814 R1 C000006815 R2 C000006817 R3 C000006818 R4 C000006819 R6 C000173226 MFS LIFETIME 2030 FUND S000002504 R3 C000006827 R4 C000006828 R6 C000173227 A C000006820 B C000006821 C C000006822 I C000006823 R1 C000006824 R2 C000006826 MFS LIFETIME 2040 FUND S000002505 A C000006829 B C000006830 C C000006831 I C000006832 R1 C000006833 R2 C000006835 R3 C000006836 R4 C000006837 R6 C000173228 MFS LIFETIME 2050 FUND S000030062 A C000092196 B C000092197 C C000092198 I C000092199 R1 C000092200 R2 C000092201 R3 C000092202 R4 C000092203 R6 C000173229 MFS LIFETIME 2025 FUND S000038773 B C000119423 C C000119424 I C000119425 R1 C000119426 R2 C000119427 R3 C000119428 R4 C000119429 A C000119430 R6 C000173230 MFS LIFETIME 2035 FUND S000038774 A C000119431 B C000119432 C C000119433 I C000119434 R1 C000119435 R2 C000119436 R3 C000119437 R4 C000119438 R6 C000173231 MFS LIFETIME 2045 FUND S000038775 A C000119439 B C000119440 C C000119441 I C000119442 R1 C000119443 R2 C000119444 R3 C000119445 R4 C000119446 R6 C000173232 MFS LIFETIME 2055 FUND S000038776 A C000119447 B C000119448 C C000119449 I C000119450 R1 C000119451 R2 C000119452 R3 C000119453 R4 C000119454 R6 C000173233 MFS LIFETIME 2060 FUND S000055287 A C000173915 B C000173916 C C000173917 I C000173918 R1 C000173919 R2 C000173920 R3 C000173921 R4 C000173922 R6 C000173923 MFS LIFETIME 2065 FUND S000072833 R3 C000229436 R2 C000229437 R1 C000229438 R4 C000229439 C C000229440 A C000229441 R6 C000229442 I C000229443 MFS CORE BOND FUND S000076470 R4 C000236386 R6 C000236387 R3 C000236388 A C000236389 R1 C000236390 I C000236391 C C000236392 R2 C000236393 811-2178 333-126328 04/30/2023 false false 1962620507.00 1810657058.00 0.00 1810657058.00 151963449.00 0.00 0.0001102 16746.37 0 16746.37 David L. DiLorenzo David L. DiLorenzo President 07/18/2023