Questions & Answers about Escribo el número de cuenta.
In Spanish, the subject pronoun is often omitted because the verb ending already shows who is doing the action.
- Escribo = I write / I am writing
- The -o ending tells you it is yo
So Escribo el número de cuenta is completely natural.
You could say Yo escribo el número de cuenta, but that usually adds emphasis, contrast, or clarity.
Escribo is the present indicative, first person singular, of escribir.
Depending on context, it can mean:
- I write
- I am writing
Spanish often uses the simple present in places where English might use either the simple present or the present progressive.