How come the US government can change tax laws over and over again during tax season?

congress actually made changes right before the end of 2006,, but those changes were to benefit the taxpayer. Your CPA if full of it... There have been no changes in the middle of tax season. If they change something today it will be fore 2007. Any good CPA would keep up with changes in tax law and know this...

The changes were made by Congress in December 2006 to extend a number of tax breaks that had been scheduled to expire, and signed into law in January 2007. Any CPA worth dealing with knew about them at the end of December, and should have held off filing returns for any clients affected by them. There haven't been other changes since then. If he's telling you that he's had to correct your return several times, he's not telling you true. I sure hope he hasn't been charging you for all the amendments - if so, you've been had.

It's definitely time to fine a CPA who knows what he's doing. Yours obviously doesn't. The late changes were all for the benefit of taxpayers and were written into law in December of 2006. Any CPA with half a brain stays on top of the changes religiously. Congress writes the laws. And yes, they could make a change in mid stream during the filing season but they have NOT done so for the 2006 tax year. For political reasons it's not likely that they ever would either.

While the answers above are correct, any changes passed in 2007, would not apply to the 2006 tax year. Not even congress is that STUPID. Article 1 Section 9 of the constitution prohibits 'ex post facto' laws. Any change to the tax law passed AFTER the end of the tax year is an ex post facto law. Changes passed after the START of the tax year could be argued to be, but after the end, there is no room for interpretation.