how to get the address of the entry point in an API

I read the microsoft docs about PE and tried to understand how to get the address of the entry point in an API but i still don't got it.I know how to get each imported dll and imported functions for each dll but don't know how to get the [xxxx] address from jmp dword ptr [xxxx] that is used to call an import function.
Can someone enlight me ... I know only the RVA's to the names of the functions


// Get a pointer to the found module's import address table (IAT)
// =====IMAGE_THUNK_DATA *pThunk;
pThunk = MakePtr(PIMAGE_THUNK_DATA, pDosHeader, pImportDesc->FirstThunk);
//This is what i was talkin about earlier...
//In pThunk, if it was image loaded in memory, you'll get the address to
//entry point of functions
//but in a disk file, It's a function name