Hi,
All general business credits combined, including the family medical leave credit, may not exceed the taxpayer's net income tax over the greater of the tentative minimum tax (which is zero for C corporations after 2017), or 25% of the taxpayer's net regular tax liability that exceeds $25,000 (Sec. 38(c)(1)). However, if the sum of general business credits does exceed these amounts, the excess can be carried back one year and carried forward 20 years (Secs. 39(a)(1)(A) and (B)). Here is support for this information:
https://www.journalofaccountancy.com/issues/2018/dec/tax-credit-paid-family-medical-leave.html
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Best,
Karen
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