The AOTC is eligible for the "first 4 years of post secondary education". If it took less than 3 years to earn my Bachelor's degree, can I claim it for my masters degree?

[xmasbaby0]

No, you cannot.  The AOC is only for undergrad study.  If it took you less than four years to complete a bachelor's degree, that does not mean you get the AOC for grad school.

https://ttlc.intuit.com/questions/3262983-who-is-eligible-to-take-the-american-opportunity-tax-credi...

But what you want to look at is the Lifetime Learning Credit:

https://ttlc.intuit.com/questions/3262984-who-is-eligible-for-the-lifetime-learning-credit

[Carl]

No, because the Master's Degree is *not* post-secondary education. But instead of the AOTC, look at the LLC (Lifetime Learning Credit). While the AOTC is limited to a maximum of $2500, the LLC has a maximum of $2000 which is not bad.