This is an example of a current revision of Schedule I (Form 1041) Alternative Minimum Tax (AMT), page 3, with field designators. Under Part IV - Line 50 Computation Using Maximum Capital Gains Rates:74. Multiply line 73 by 15% (.15) field contains 06I74.>79. Subtract line 78 from line 55 field contains 06I79>80. Multiply line 79 by 25% (.25) field contains 06I80>81. Add lines 61 74, 77, and 80 field contains 06I81>