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.
1 Ovulation. 2  Regular predictable periods that occur every 24â32 days likely reflect ovulation. 3  Ovulation can be predicted by using an ovulation predictor kit and can be confirmed by a blood test to see the womanâs progesterone level. 4  A womanâs menstrual cycle is, on average, 28 days long.