Saving Sheet As Tab Delimited Text

I have a workbook with sheets of data that should be imported into another system. So i would like some code that does the following:

1.) make a copy of worksheet x and paste (paste special) the values in a new worksheet.
2.) Delete row 1 in new worksheet (the labels)
3.) Ask the user for a file name and path and save the worksheet as a tab delimited txt file.
4.) Delete the worksheet created in 1.)
5.) Leave the user with the original .xls file
I will assign this macro to a button so the experience for the user is:
1.) press button
2.) input file name and location and have a text file saved
3.) be left in the original xls document.
I tried with the following code but get stuck with this error : "Run-time error 91: Objeck variable or with block variable not set."

Sub Export_x_DK()
Dim w As Workbook
Application.ScreenUpdating = False
Application.DisplayAlerts = False
ThisWorkbook.Sheets.Add After:=Sheets(Sheets.Count)
ActiveSheet.Name = "Export_2023"
Sheets("Depreciation x (DK)").Select
Cells.Select.........................