Almost two years after Senate Majority Leader Harry Reid repeated an unsubstantiated report that Mitt Romney did not pay taxes, one of the Romney sons fired back.

Josh Romney tweeted a photo of his father standing in line at the post office to mail his tax forms Tuesday evening.

Hey @SenatorReid here's a shot of @MittRomney paying taxes. Does it every year. It's how you get your paycheck. pic.twitter.com/DwSMXzYhuR

- Josh Romney (@joshromney) April 15, 2014

And then it suddenly felt like we were back in the political brawl of 2012 as Ben LaBolt, a former spokesman for President Obama's campaign, weighed in.

Pic of the vault in Zurich? MT @joshromney Hey Sen Reid here's a shot of Mitt paying taxes. Does it every yr. It's how you get yr paycheck.

- Ben LaBolt (@BenLaBolt) April 15, 2014

In case you forgot about the Harry Reid-Mitt Romney tax spat, here's a recap.

In the summer of 2012, Reid said someone who worked with Bain Capital, which Romney led, called his office to say that Romney "didn't pay any taxes for 10 years."

"He didn't pay taxes for 10 years! Now, do I know that that's true? Well, I'm not certain," Reid told the Huffington Post in an interview. "But obviously he can't release those tax returns. How would it look?"

Romney denied this, saying Reid needs to reveal his source.

"Harry Reid really has to put up or shut up," Romney said.

The book, "Double Down: Game Change 2012," cited Jon Huntsman Sr., whose son Jon Huntsman Jr. ran for president in 2012, as the source of the tax rumor, an accusation Huntsman denied.