Intrastat declaration

Dear Gurus,

i'm implementing SAP S/4 Hana to  a customer and now i'm concerned about INTRASTAT declaration. I saw that some old tcode ( VEFU for example) are no longer avaiable in SAP S/4 Hana.

Anyone knows what changed on Intrastat declaration? I heard about SAP GTS but i don't know if it is necessary for intrastat declaration.

thanks