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.
If you are filing a paper return, you must file form 1040 when claiming any medical tax deductions. The total expenses are entered on Schedule A, which you attach to your return. Or you can start free online, tax returns and forms are completed for you automatically when you efile.