The menstrual cycle is from Day 1 of bleeding to Day 1 of the next time of bleeding. Although the average cycle is 28 days, it is normal to have a cycle that is shorter or longer.Girls usually start having menstrual periods between the ages of 11 and 14. Women usually start to have fewer periods between ages 39 and 51. Women in their 40s and teens may have cycles that are longer or change a lot.he menstrual cycle is from Day 1 of bleeding to Day 1 of the next time of bleeding. Although the average cycle is 28 days, it is normal to have a cycle that is shorter or longer.
If you have employees, including household employees, keep your employment tax records for at least four years after the date that payroll taxes become due or is paid, whichever is later. This should include forms W-2 and W-4, as well as related pay information including benefit forms.
1 Typically, the IRS can come after your business for failing to report income for up to 6 years after your filing if the amount is greater than 25% of your businessâs gross income. 2  If you filed for a deduction for a bad debt or worthless security, the IRS suggests you keep your supporting tax records for 7 years.ere are some basic record retention rules to think about for your business. 1  Business Income Tax Returns and Supporting Documents. 2  It makes sense to keep a final copy of your business income tax returns and related correspondence with the IRS permanently to help you prepare future or amended returns.