需要帮助更正VBA /宏代码以将多个选项卡合并为一个

I am new to VBA and have primarily used it in conjunction with creating a macro. As you can see from the code below, I am trying to take tables from three different tabs and merge them into one. However, I am having a hard time understanding how to ensure that each table will paste directly underneath the previous table and not overwrite it (especially when each month new rows are created).I am new to VBA and have primarily used it in c