Retirement tax questions

@fanfare 

It's a sad story 😂

My wife and I both made a $6000 after tax contribution to IRA, then I convert it to roth IRA, but someone told me I will have to pay tax on the conversion because I have IRA balance, and conversion is not reverseable. 

Then to avoid this double tax, my wife withdraw her after tax contribution to IRA. So our family have the two scenario, She does not need to pay tax again but I will have to.