It was inevitable. Now that a majority of gay Americans live in places where same-sex marriages are allowed, they have some practical concerns to deal with, like what such unions mean for filing taxes.

The Tax Foundation has been tracking the guidance states have been giving to same-sex couples all year, starting with a short January explainer on information provided by 22 states. They published an update Wednesday, with information on another 10 states whose marriage fights recently came to an end.

Of those, seven — Indiana, North Carolina, Oklahoma, Utah, Virginia, West Virginia and Wisconsin — currently allow married same-sex couples to file jointly. (In Utah, that was the case even before the recent developments.) In Idaho, where same-sex marriages began Wednesday, officials told the Tax Foundation that they hope to have guidance by the end of the week. In Alaska and Nevada, there are no individual income taxes.

Here’s a look at some of the broad takeaways, as relayed by Tax Foundation spokesman Richard Borean:

  • Most states that have given same-sex couples formal guidance have allowed them to amend previous years’ returns to reap the benefits of married status, though how far back then can go varies by state.
  • Marriage recognition also means that some employers in states where it’s allowed can exclude from an employee’s income the cost of a health plan for their same-sex spouse.
  • Depending on state tax treatment, employers in some places may now be able to exclude as taxable wages their contributions to health savings accounts that provide benefits to same-sex spouses.

Read more about the tax implications of same-sex marriages over at the Tax Foundation.