By weight, the average human adult male is approximately 60% water. However, there can be considerable variation in body water percentage based on a number of factors like age, health, weight, and sex.
How to claim medical tax deductions. Once you've totaled your medical expenses for the year, fill out the appropriate form in your tax return. If you include medical expenses in your itemized tax deductions, make sure to save your medical bills and payment statements as proof.
You can claim a refund if you paid too much tax, eg because you: 1  made a change to your tax return after you filed it. 2  entered the wrong amount when paying your Self Assessment bill.3  stopped being self-employed and have payments on account.. You can claim a refund if you paid too much tax, eg because you: 1  made a change to your tax return after you filed it. 2  entered the wrong amount when paying your Self Assessment bill. 3  stopped being self-employed and have payments on account.