In English where should you place periods and? Used in dialogue would it be outside the opening quotation marks, or outside the closing quotation marks or inside the opening quotation marks or inside the closing quotation marks

In English, periods should typically be placed inside the closing quotation marks when used in dialogue. For example:

"I can't believe it," she said.

In American English, periods are always placed inside the closing quotation marks. In British English, however, periods are often placed outside the closing quotation marks.