How will getting married effect my taxes?

No matter when you get married during the year, your filing status for your return is determined by your status on December 31 of that year. If were legally married on 12/31, you will have the option of filing as Married Filing Joint (MFJ) or Married Filing Separately (MFS) - though it is worth noting that Married Filing Separately is rarely financially as viable as Married Filing Joint, you would have the option to file separately with that status.

The IRS does offer more information on the impact of MFJ vs. MFS through their website: