If you allow too much tax to be withheld, you get a refund. You can determine how much is tax is taken out of your pay by the number of allowances you claim on your W-4. The W-4 has a worksheet to help you figure out how many personal allowances to take.
Step 5: Predict your next period. Now that we know how long your period cycle is, we can just use it to count the days to predict your next period. My period cycle is 28 days so if I count 28 days from February 10, that's when my next period should come.
3. Keep a record. Note the first and last days of your period on a calendar. This way, you can an estimate when your next period might come. Most women's periods come every 28 days, but if you keep track of your periods, you can determine what length your own cycle is. 4. Use an app.