Contribution Rule Limits
While most taxpayers may not contribute the maximum amount allowed to their HSA, you may need to explain these limits to taxpayers. The amount that can be contributed to an HSA depends on the:
If the taxpayer is an eligible individual on the first day of every month with the same coverage for the entire year, the full contribution amount is allowed.
In the software, Limitation Worksheet is at the bottom of Form 8889, page 1. You will also need the Instructions for Form 8889.