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.
Safe period calculator helps you to find out the safe days that you can make love without fear. In natural way you can avoid pregnancy by remembering some dates. By simply giving your last period date and longest and shortest period cycle, SAFE PERIOD CALCULATOR finds out the safe and unsafe dates of your menstrual cycle. You have to note your period for at least 6 months and note the number of days between starting date and the next period. Then identify longest and shortest period cycles. If a women's menstrual cycle varies from 26days to 31days cycle, The shortest cycle [26days] minus18days=8th day.