Irs

at what point do you give up arguing with them? been going on for close to a year now. this will be the 6th time i have sent them in documents in support of my claim. each time i send stuff back we get closer to being in agreement. now we are only $1200 off in what we owed as a refund. get them on the phone and they agree with me, then 3 weeks later we get more crap in the mail from them that disagrees with what they said on the phone