I want to claim a federal and state solar tax rebate but don't have enough liability right now. Can I change my W-4? Up, down or is there another way?

[carigari]

more tax owed so can use tax credits

[SweetieJean]

Please read this entire discussion on a similar credit:

https://ttlc.intuit.com/questions/4114325-i-purchased-a-17-nissan-leaf-how-do-i-maximize-the-tax-cre...

[SweetieJean]

Bottom line: You need to generate additional taxable income, not change your W4 withholding. But be aware that Congress is looking at 2017 tax law changes.

[SweetieJean]

An unused Federal solar credit can be carried forward to the next tax year.