You can still use education tax credits while taking advantage of a 529 account; you just have to make sure that you're not using the same qualified education expenses for more than one tax benefit.
The American Opportunity Credit and the Lifetime Learning Credit are the two educational tax credits. Of the two, the AOC is generally the better credit, assuming that the taxpayer is fully eligible for both credits. The AOC provides a credit of up to $2,500 (up to $1,000 is refundable) on up to $4,000 in qualified education expenses. So if you have a 529 account and also want to use the AOC, pay $4,000 of AOC eligible expenses with non-529 dollars. For example:
Let's say that for the fall semester for a full-time student, tuition is $20,000, fees are $500, room and board is $5,000, and required books/supplies are $500, for a total of $26,000. All of these are 529 eligible expenses. But instead of paying the full $26,000 from the 529, pay only $22,000 from the 529, and pay the other $4,000 from a regular checking or savings account (anything that's not using tax-advantaged dollars). You can designate this $4,000 as going to pay part of the tuition bill, since tuition is an AOC eligible expense. This way, you can use 529 funds to pay most of the expenses, and still take full advantage of the AOC.
IRS pub 970 has advice for coordinating between 529 accounts and the tax credits. See page 61 of the previously linked document.