The second one should be sufficient. Here you have an example how to fill this print.
In the first window you enter your address information and the phone number.
Below you may give again phone number for the delivery confirmation SMS.
Next you check which post service you choose.
If the weight of your package does not exceed 10kg, the EXTRA24 service will cost 25.50zl, PACZKA24 - 20.50zł, PACZKA48 - 19zł
On the right side you may check if you want insurance for it (amount of zł) and/or acknowledgment of receipt.
Where it says "Inne" - you may wish to delivery for ex. at Saturday - this cost extra.
"Zawartość przesyłki" means contents of the shipment (for example books, gift, etc.)
ADRESAT=the addressee data
Doręczenie po 17 = delivery after 17 (5PM)
Ostrożnie - caution
Opłata=fee (but the last two will be filled by the postal clerk)