You can use the EDATE() function in Google Sheets to quickly add a certain number of months to a date.

This formula uses the following basic syntax:

EDATE(start_date, months)

where:

• start_date: The starting date
• months: The number of months to add to the starting date

For example, we can use the following syntax to add 10 months to the date in cell A1:

```=EDATE(A1, 10)
```

The following example shows how to use this function in practice.

Suppose we have the following list of dates in Google Sheets:

We can use the following formulas to add a specific number of months to the values in the Date column:

The values in column B show the value of the original date plus one month.

The values in column C show the value of the original date plus six months.

The values in column D show the value of the original date plus 15 months.

Note that you can also use negative numbers to subtract months from a date.

The following screenshot shows how to do so:

The values in column B show the value of the original date minus one month.

The values in column C show the value of the original date minus six months.

The values in column D show the value of the original date minus 15 months.

Note: You can find the complete documentation for the EDATE() function here.