اكتب بيانات الاتصال هنا.

A common pronunciation is:

uktub bayānāt al-ittiṣāl hunā

A rough sound guide:

• اكتب = uktub
• بيانات = bayānāt
• الاتصال = al-ittiṣāl
• هنا = hunā

Notes:

• ك is like k
• ب is like b
• ص in اتصال is an emphatic s
• The long ā sound appears in bayānāt and hunā

اكتب is an imperative verb, meaning it is a command: write.

It comes from the verb كتب = to write.

In this sentence, اكتب is addressed to:

• second person
• singular
• masculine

So literally, it is write! said to one male, or used as a general instruction.

It is not written separately, because in Arabic the verb already includes that information.

So اكتب already means:

• you write
• or, in command form, write!

Arabic often leaves subject pronouns unstated when the verb already makes the subject clear. That is very normal.

In Arabic, the masculine singular form is often used as the default in general instructions, especially in textbook-style or form-style language.

So even if the instruction is meant for any reader, اكتب is still common.

If you wanted other forms, they would be:

• to one woman: اكتبي
• to two people: اكتبا
• to a group of men or mixed group: اكتبوا
• to a group of women: اكتبن

بيانات literally means data, details, or pieces of information. It is grammatically plural.

Arabic often uses a plural word where English prefers a mass noun like information.

So بيانات الاتصال is very naturally understood as:

• contact details
• contact information

Even though the English translation may sound singular, the Arabic noun itself is plural.

This is an iḍāfa construction, often called a possessive or noun-link construction.

It is made of:

• بيانات = details/data
• الاتصال = contact/communication

Together, they mean something like:

• the details of contact
• more naturally, contact details

Important iḍāfa rules you can see here:

• the first noun usually does not take ال
• the second noun can be definite
• the whole phrase becomes definite because the second noun is definite

So:

• بيانات الاتصال = the contact details

The basic meaning of اتصال is contact, communication, or connection, depending on context.

In this sentence, it means contact in the sense of reaching someone.

So بيانات الاتصال means:

• contact details
• contact information

In other contexts, اتصال could also refer to:

• a phone call
• communication
• a connection

هنا means here.

Putting it at the end is very natural in Arabic, especially in short instructions:

• اكتب بيانات الاتصال هنا = write the contact details here

Arabic word order is more flexible than English. In this sentence, ending with هنا sounds completely normal because it tells you where to write.

You may also see adverbs of place in other positions, but this final position is very common in instructions and form labels.

A fully vowelled version is:

اُكْتُبْ بَيَانَاتِ الاِتِّصَالِ هُنَا

A few grammar notes:

• اُكْتُبْ = imperative verb, ending in sukūn
• بَيَانَاتِ = direct object of the verb, so it is in the accusative
• because بيانات is a sound feminine plural form, its accusative ending is kasra, not fatḥa
• الاِتِّصَالِ = genitive because it is the second term of the iḍāfa
• هنا is an indeclinable adverb

In normal everyday Arabic writing, these short vowels are usually omitted.

Yes, very natural.

This kind of sentence is exactly the sort of Arabic you might see in:

• forms
• applications
• worksheets
• instructions on a website

It is short, direct, and standard in Modern Standard Arabic. A very similar alternative could be:

• اكتب معلومات الاتصال هنا

But بيانات الاتصال is especially common in formal and administrative contexts.