My contribution to my Simple IRA was postmarked April 10 but Schwab claims they received it on the 17th and have posted it as a 2019 contribution. I get different answers from IRS, Schwab and the web about postmark date versus received date. My federal taxes were filed and accepted on the 6th. I'm a sole proprietor and am the only one on the Simple IRA plan. I've asked Schwab to repost the deposit and they said the IRS won't allow that.
