@lakksh
In your first post on this page, you note that deleting the electric vehicle credit allows your credit for the charging station. This wouldn't necessarily always be the case, but it wouldn't be unexpected, either. If you have significant credits, as described below, you may not be able to claim the charging station credit, even if you don't actually owe alternative minimum tax.
You have to take into account the computation for net regular tax, which is a computation made on line 16 of Form 8911. This amount equals your regular tax before credits (line 14), minus certain credits reflected on line 15.
This net regular tax is then compared to your tentative minimum tax (line 17). If your tentative minimum tax is greater than your net regular tax, you can't claim the credit.
You can walk through this looking at the forms linked below. It's an involved computation.
If you'll look at Form 8911, Alternative Fuel Vehicle Refueling Property Credit, you'll note that line 15 reflects credits that reduce your regular tax (line 14) before the alternative fuel vehicle refueling property credit will be applied. This includes foreign tax credit on line 15a.
But it also includes certain credits included on line 15b. If you'll look at Line 15b in the Instructions for Form 8911, the taxpayer is instructed to:
Enter the total of any credits on Form 1040, 1040-SR, or 1040-NR, line 19, and Schedule 3 (Form 1040), lines 2 through 5, and 7 (reduced by any general business credit reported on line 6a, any credit for prior year minimum tax reported on line 6b, or any credit to holders of tax credit bonds reported on line 6k).
So, line 15b is:
- Form 1040, line 19, which is Child tax credit or credit for other dependents from Schedule 8812, plus
- Schedule 3 (further down the Form 1040 page in the Schedule 3 link), line 2, which is Credit for child and dependent care expenses from Form 2441, line 11, plus
- Schedule 3, line 3, which is Education credits from Form 8863, line 19, plus
- Schedule 3, line 4, which is Retirement savings contributions credit from Form 8880, plus
- Schedule 3, line 5, which is Residential energy credits from Form 5695, plus
- Schedule 3, line 7, Total other nonrefundable credits, reduced by any general business credit reported on line 6a, any credit for prior year minimum tax reported on line 6b, or any credit to holders of tax credit bonds reported on line 6k.
So, if you have any of these credits, they'll combine to lower your net regular tax from what your regular tax amount is.
In the end, net regular tax on line 16 equals line 14 (regular tax before credits) minus line 15 (the foreign tax credit plus any of the credits listed above).
If your tentative minimum tax on line 17 is greater than the net regular tax amount on line 16, you can't claim the refueling property credit.
