En la última página del informe hay un borrón, así que voy a imprimir otra copia.

Because de + el contracts to del in Spanish.

So:

• de + el informe → del informe
• But de + la página stays de la página

This contraction happens almost always with de + el, except when el is part of a proper name, such as de El Escorial.

Hay is used to say that something exists or there is/there are something somewhere.

So hay un borrón means there is a smudge.

You would use está more when talking about the location of something specific and already identified. Compare:

• Hay un borrón en la página. = There is a smudge on the page.
• El borrón está en la última página. = The smudge is on the last page.

In this sentence, the speaker is introducing the smudge as something present on the page, so hay is the natural choice.

Here borrón means a smudge, blot, or mark, especially one that makes the page look messy or imperfect.

It often suggests something accidental, like ink or toner that has spoiled the page. It can also be used more figuratively in other contexts, but here it is very literal.

A nearby word is mancha, which is a more general stain/spot/mark. Borrón often feels especially appropriate for writing or printing mistakes.

Yes, in this sentence así que means so, therefore, or so then.

It connects the cause and the result:

• Hay un borrón = There is a smudge
• así que voy a imprimir otra copia = so I’m going to print another copy

It is very common in everyday Spanish. Other similar expressions are:

• por eso = for that reason / that’s why
• entonces = then / so

But así que is a very natural way to link the two parts of this sentence.

Both are possible, but voy a imprimir is very common in everyday Spanish, especially for a near or intended future action.

• voy a imprimir = I’m going to print
• imprimiré = I will print

In spoken Spanish, ir a + infinitive often sounds more natural and conversational. Since the speaker has just noticed the smudge and is stating the next action, voy a imprimir fits very well.

In Spanish, otro/otra normally goes directly before the noun without un/una.

So you say:

• otra copia = another copy
• not una otra copia

This is different from English, where another historically contains the idea of an + other, but in modern Spanish you simply use otro/otra.

Here copia means copy, and in context it clearly refers to another printed copy of the report.

Depending on context, copia can mean:

• a duplicate copy of a document
• a photocopy
• a printed version
• sometimes even a digital copy

Because the sentence says voy a imprimir otra copia, the meaning is specifically another printout/copy.

Spanish often places the location or context first, especially when setting the scene before introducing new information.

So:

• En la última página del informe hay un borrón
  means
• On the last page of the report, there is a smudge

This word order is very natural. You could also say:

• Hay un borrón en la última página del informe

That is also correct. The version in your sentence puts slightly more focus on where the problem is.

They have written accents to show the correct stress.

• última: stress on the first syllable
• página: stress on the first syllable
• así: stress on the last syllable

These accents are part of standard Spanish spelling and help show pronunciation. They do not change the basic meaning here, but they are important to write correctly.

Spanish uses definite articles more often than English does.

• la última página = the last page
• del informe = of the report

In English, article use can sometimes be reduced depending on style, but in Spanish these articles sound fully natural and expected. They help identify the specific page and the specific report being discussed.

Yes, you could, but la última página is more common and more neutral for the last page.

• la última página = the last page
• la página final = the final page

Both are understandable. La página final can sound a little more formal or stylistic, while la última página is the most everyday choice.

A natural Spain Spanish pronunciation would sound roughly like this:

En la ÚL-ti-ma PÁ-gi-na del in-FOR-me hay un bo-RRÓN, a-SÍ que voy a im-pri-MIR O-tra CO-pia.

A few useful pronunciation points:

• ll in última is not relevant here, but j does not appear either; most words are quite phonetic.
• rr in borrón is a strong rolled r.
• h in hay is silent.
• In much of Spain, z and soft c are pronounced with a th-like sound, but there is no z or soft c in this sentence.

The stress pattern is one of the keys to sounding natural.