If you've chosen category 1 or 3, your taxes are calculated at the Single rate. Category 2 is calculated at the Married rate. Here is how the marital status categories appear in the Tax Data section of your pay statement: What You Claim on Your W-4.
Remember, with winter tires only the first 50% of tread is really for use. After that, you have the equivalent of half-worn all-season tires. Blizzak special outer rubber differs from lower layer, too, as the maker informs. Winter tires with 11/32 new tread depth are effectively kaput at 6 or 5 / 32. You should not push regular tires below 4/32 in any case, see wet stopping distances at full, at 4 and at 2 /32 video comparisons on Tirerack.com.
Rodgers says if you can stick a quarter in the tread and not see the top of Washington's head, you're in good shape. If you can, it's time for new rubber. Likewise, snow and all-season tires require even more depth to effectively evacuate snow and slush: about 6/32.