function onEdit(e){
var sheet = e.range.getSheet();
var row = e.range.getRow();
var col = e.range.getColumn();
var col2 = sheet.getRange(row,2);
if (col === 2 && col2 !== ""){
var checkboxRange = sheet.getRange(row,3);
var enforceCheckbox = SpreadsheetApp.newDataValidation();
enforceCheckbox.requireCheckbox();
enforceCheckbox.setAllowInvalid(false);
enforceCheckbox.build();
checkboxRange.setDataValidation(enforceCheckbox);
SpreadsheetApp.getActive().toast("Вуаля");
}
}