There are no rules against what you're trying to do. In fact, it's fairly common.
It gets "messy" in two ways: 1. You still have to meet the dependent rules (explained at the referenced link
https://ttlc.intuit.com/community/taxes/discussion/can-i-claim-my-daughter-who-got-married-on-decemb...
and by others here, on this post.
2. Your spouse, most likely, will have to pay more tax, because he loses the benefits of Married filing jointly (MFJ), or is hit by limitations on those filing Married filing Separately (MFS).
Basically, you have to weigh the value of the tuition remission against what he loses in tax benefits. If you have to pay tuition, you will, most likely, be eligible for a tuition credit (another messy detail).
Consider buying the download version of TurboTax, instead of online, as it easier to do "test returns", with the down load software. You and your parents can use the same down loaded program to prepare and file your returns.
