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.
Calculate your menstrual cycles and determine the dates you wish to start your period. Look over a calendar and pay close attention to the normal duration of your cycle. Record the date of your last menstrual cycle and other pertinent data so that you can show it to your doctor.alculate your menstrual cycles and determine the dates you wish to start your period. Look over a calendar and pay close attention to the normal duration of your cycle. Record the date of your last menstrual cycle and other pertinent data so that you can show it to your doctor.